Article of manufacture and method for the production thereof



Nov. 11, 1924. 515,062

U. S. M MILLAN ARTICLE OF MANUFACTURE AND METHOD FOR THE PRODUCTION THEREOF Filed March 27, 1923 Inven-zior. Z/eZ ,St ZMFMZZQW.

Patented Nov. 11, 1924.

. UNITED, sTA Es PATENT emu-n;

UEL s. cMiLLAN; or salt FRANCISCO. GALI N IA.

ARTICLE OF MANUFACTURE AND 'METHOD FOR THE PRODUCTION" THERE-01*".

Application fi1ed-March-27,'1923. Serial 1%, 527,919.

To all whom it may a o-meme" I Be it known that I, Unn S. BICBITLLAN. a

citizen of the United States, residing atthe city and county of San Francisco and State of California, have invented certain new and useful Improvements in Articlescof Manufacture and Methods for the Production Thereof, of which the following is a specifi cation.

The hereinafter described invention comprises-mechanical wood pulp and the-method forthe production thereof, the said pulp being utilized mainly in connection with the manufacture ofwpaper, and the method of producing the wood pulp consists in the defiberization of wood and subjecting the fiber recovered therefrom to a beating action in the -presence ofwater,v whereby the fiber is reduced to intermassed pulp formation and the pulp so produced subjected to an action for the elimination of the excess moisture contained therein-and thereafter, preferably passed between heated rollers for the final pressing of, the-pulp and the dryingthereof; c

the mechanical paper pulp thus roduced being free of cooking treatment either before-or during the process of the pulp for-i mation. Y j I Heretofore, the production of mechanical wood pulp fpr use in connection with [the wood pulp, inasmuch as (the de-fiberized wood produces a pulp of such formation that the intermatted wood fibers form the binder and filler for the paper. The object of the invention is the production of a more economica-l mechanical wood pulp than that formed by the present method, to materially improve the quality of the mechanical vwood pulp and to produce a mechanical wood pulp better adapted for the manufacture therefrom f high grade paper than the pulp for ,such purpose, wherein at present supplied to thepaper manufac;

turers. v l In thecarry ng out of my method in- '\'ention the wood is first defiberized being subjected to a combing actionin line with the length of the fibers of the same and the defiberized wood is then transferred to within a tank or receptacle containing a body of water and whilelwithin said. recep tacle the defiberized wood is subjected to a beating action in the presence of the water for a given length oftime, which beating, action serves to reduce each fiber of the wood into component parts or a number of finer f tiers and these fibers: being subjected repeatedly to the beating action of the means within the body of water, are interlaced or intermatted to such an extentthat the same.

may be removed as a moistened body from within the tank of water and transferred as IIIOlSiZGDGd pulp; to, suitable means for extracting moisture therefrom and drying the body of pulp, so that the resultant product is mechanical wood pulp of any desired thickness and assuch is incondition for the manufacture of high grade paper therefrom. Any suitably constructed apparatus T may be employed for the carrying out of the method invention, there being illustrated in the ac; companying sheet oidrawings a simple,-efficient and practical form of anapparatus Fig. 1 1s a vertical sectionalfdiagrammatic view: illustrating I one form of means for the defiberization of the wood, the tank into which the defiberized woodis transferred, means within the tank for-subject ing the wood fiber toa beating action for the production of wood pulp therefrom and the means for removing the pulp and the drying thereof. i i

Fig, 2 is a transverse vertical sectional view taken on t-he line XX,Fig. c1 of the drawings.

In the drawings, the

g p numeral .lcis. used to designate a hopper mounted for lorigitudiQ na-l reciprocating movement over a series of transversely disposed rolls 2, the hopper being anopen-bottomed one and adapted-to receive layers of wood 3 to beidefiberiz ed, The hopper 1 is mounted for longitudinal reciprocating movement above a plurality of oppositely rotating combing elements 4, whichareadapted to be driven athi'gh rotative speed; .These combing ,elements 4; are

against the periphery of which t e layers or slabs 3 of wood tobedefiberized are -held by gravity. In the present case,

the defiberizing brushes 4: are mounted for rotation within a hopper 5, into which falls the fibers as the wood is defiberized and passes therefrom through-a conduit 6 into a tank 7, which tank -*is-' substantially filled with a body of water 8. This tank is preferably approximately '20 feet in length and 15 feet in width, having a depth of approximately 5 feet. WVithin one portion of the tank is mounted for rotation a transversely disposed heater 9, the longitudinally radially extended circumferentially disposed ribs 10 thereof coacting with, a. longitudinally ribbed beater plate 11 between which and the ribs or blades of the beater 9 the defiberized wood delivered with in the tank 7 passes and during such passage therethrough the moistened fibers of the wood are separated into component 'units or smaller fibers and these fibers during the repeated action of the beater are interlaced or interwoven one with the other in such a manner as to produce an interlaced body of pulp. In the present case the 7 body of pulp is withdrawn from within the suction pump 14 anddelivered by means of 3 the conduit 15 into an upper disposed tank tank 7 and discharged by the valve controlled outlet pipe 12 into a suction tank 13, from which the sameis removed by the 16. Within the tank 16 is mounted for rotation a transversely disposed hollow drum 17, the eriphery ofwhich is formed of reticulated v the rotary movement thereof picks up the pulp delivered into the tank 16 and deposits the same onto a downwardly inclined plate 18 from which the pulp moves onto an endless traveling belt or conveyorv 19 and'carried thereby between the pressure rolls 20 which coacting with the supporting rollers 21' for the belt '19 presses excess moisture from within the pulp, the pressed'pulp be-' ing then delivered by the endless conveyor 19 onto the downwardly'in'clined plate 21 which deposits the same onto the endless traveling belt 22. The conveyor '22 carries the body of woodpulp between the heated rollers 23 and 24 for a drying of the pulp.

The thickness of the pulp as delivered from the conveyor 22 will depend entirely upon the amount of pulpwhich is permitted to'build up on the screened or reticulated periphery of the drum 17 prior to the delivery thereof onto the downwardly inclined plate or a ron 18', but the pulp when delivered from t e conveyor 22 is in the appearance of a coarse, heavy, thick paper-like structure and as such is in condition for delivery to the paper mills for use in the manufacture of high grade paper therefrom.

material 17 and this drum during.

As the wood pulp which adheres to the screened or reticulated surface of the drum 17 is raised from within the tank 16, the water contents thereof drains through the said screened surface and is returned to the interior of the drum 17 and flows therefrom "through thedownwardly extended pipe 16 berized wood within the tank, wood pulp of varying degrees of fineness may be pro duced.

So far as applicant is aware, he is the first to produce mechanical wood pulp for use in connection with the manufacture of paper therefrom, which pulp is prepared from defiberized wood placed bya beating action in the presence of waterinto'a matted or interlaced condition without the require-' ment of incorporating therein chemicals of any kind, whereby there is produced a finished mechanical wood pulp as a product of manufacture in a condition for the manufacture ofpaper therefrom in'the usual manner resorted to by paper manufacturers,

and the wood pulp so produced is of such a character that paper may be manufactured therefromwithout the addition thereto of other forms of treated pulp to serve as a binder therefor, due to the fact that the defiberized wood when subjected to a beating action in the presence of water produces a pulp which serves asa binder and filler for the paper and therefore the expense incident to-the manufactureof paper is reduced to a minimum. I

' The pulp mixture withdrawn from the tank 7 is in the form of asomewhat thickened body, the degree thereof de ending upon the period of time allowed for t e beat-' ing action of the defiberized wood; and while preference is given to theformation vof the wood pulp without chemicals for bleaching or other purposes,'and without the incorporation of chemical pulp therein, nevertheless, if so desired, such chemicals may be added-tothe pulp mixture as formed within the saidtank 7.

- 'Having thus described my invention, what I claim as new and desire to protect by Let-- ters Patent is 1. The method of producing sheets of mechanical wood pulp for use as paper stock, the same comprising the defiberization of solid wood in line with the length of the fibers thereof for the production of individua1 fibers of the wood, transferring the fibers so separatedand depositing the same within 1 a vessel containing water, subjecting the fibers while immersed therein to a beating action for reducing the fibers to com onent units and causing an interlacing t ereof, then removing the matted formed pulp from within the vessel and separating excess moisture therefrom, placing the pulp in sheet formation and finally drying t e same.

2. The method of produclng sheets of mechanical wood pul for use as paper stock, the same comprising defiberizing solid wood in line-with the-len h of its fibres for the production of indivi ual fibers of the wood containing water, subjecting the fibers while 15 immersed therein to a beating action for reducing the fibers to component units and causing an interlacing thereof, removing the matted formed ulp from within the vessel and separating the water therefrom; passing the separated pulp between pressure rollers for removin excess moisture therefrom, and lacing t e same in sheet formation, and ally passing the same between heated pressure rollers for a dryin thereof. In testimony whereof I havevslgned my name to this specification.

UEL S. MOMILLAN. 

